Head-to-head · profiles checked Sep 29, 2026
Pick Antigravity for a free individual plan and parallel agents in a desktop app; pick Codex if you already pay for ChatGPT. Antigravity's Individual plan is $0/month, but its AI Pro and Ultra prices are not shown. Codex starts free, with Go at $8/month and Plus at $20/month, and works from a CLI, IDE, desktop app, web and iOS. Neither profile documents privacy terms.
We based this comparison on our Google Antigravity and OpenAI Codex profiles, both verified 2026-09-29 from official vendor pages; it uses no third-party benchmarks and no vendor paid for placement.
Antigravity is the pick if you want a free individual plan and a desktop app that runs several coding agents in parallel, with a CLI, Python SDK and IDE extensions around it. Codex is the pick if you already pay for ChatGPT, since its usage is included in ChatGPT plans and it adds a cloud agent on the web and iOS. Antigravity's AI Pro and Ultra prices are not shown on its pricing page, while Codex lists Go at $8/month and Plus at $20/month. Neither profile documents privacy or training terms, so check those before using private code.
Based on our Google Antigravity and OpenAI Codex profiles, both verified 2026-09-29 from official vendor pages; privacy pages for both could not be read, and no benchmark was run.
Our own captures of each vendor's public pages. Click a frame for the full-size image.
If you only want the answer, this is the table. Everything below is the evidence from the two documented profiles.
| You want to | Use | Why |
|---|---|---|
| Run several coding agents at the same time | Google Antigravity | Antigravity's desktop app manages several local agents in parallel; Codex lists no parallel-agent app |
| Code in the terminal | Either | Antigravity has a terminal CLI with background subagents; Codex has an open-source CLI |
| Build my own custom agent | Google Antigravity | Antigravity offers a Python SDK for custom agents; Codex lists no SDK |
| Review pull requests automatically | OpenAI Codex | Codex lists automatic code review on connected GitHub repositories; Antigravity lists none |
| Start a coding task from my phone | OpenAI Codex | Codex on the web and iOS is listed for Plus; Antigravity lists no mobile app |
| Work inside VS Code, Cursor or Windsurf | OpenAI Codex | Codex lists an extension for all three; Antigravity names VS Code, Visual Studio, JetBrains and Zed support |
| Use agent features in JetBrains or Zed | Google Antigravity | Antigravity lists JetBrains and Zed among its IDE options; Codex does not |
| Run an agent in CI | OpenAI Codex | Codex documents API-key use in CI; Antigravity lists API access but no CI use |
| Try an agent for free | Either | Both have a $0 plan: Antigravity Individual and a Free ChatGPT plan for Codex |
| Plan | Tool | Price | Limits |
|---|---|---|---|
| Antigravity Individual | Google Antigravity | $0/mo | Basic weekly rate limits |
| Antigravity Google AI Pro | Google Antigravity | Price not shown | More rate limits; flexible AI credit pool |
| Antigravity Google AI Ultra | Google Antigravity | Price not shown | Even more rate limits; flexible AI credit pool |
| Antigravity Business via Google Cloud | Google Antigravity | Contact sales | Not stated |
| Antigravity Gemini Enterprise Standard/Plus | Google Antigravity | From $30/seat/mo | Not stated |
| Antigravity API pay-as-you-go | Google Antigravity | Usage-based | Not stated |
| Codex Free | OpenAI Codex | $0/mo | Desktop app only listed; usage limits apply |
| Codex Go | OpenAI Codex | $8/mo | Desktop app only listed; usage limits apply |
| Codex Plus | OpenAI Codex | $20/mo | Usage limits apply; allowance shared per five-hour period, weekly limits may apply |
| Codex Pro | OpenAI Codex | $100, $200 or $500/mo tiers | Higher usage than Plus; currently no five-hour limit, weekly limits may apply |
| Codex Business | OpenAI Codex | $25/user/mo ($20 annual) | Usage limits apply; extra credits can be bought |
| Codex API key | OpenAI Codex | Pay per API token | No GitHub code review or Slack |
USD as published on each vendor's pricing page, checked Sep 29, 2026. Google Antigravity pricing in full · OpenAI Codex pricing in full
| Google Antigravity | OpenAI Codex | |
|---|---|---|
| Messages / rate limits | Individual: basic weekly rate limits; Pro and Ultra: more rate limits plus a credit pool | Usage limits apply per plan; Plus shares an allowance per five-hour period, and weekly limits may also apply |
| Context / file size | Not stated | Not stated (context window not confirmed) |
| Seats / team | Business via Google Cloud, contact sales; Gemini Enterprise Standard/Plus from $30 per seat per month | Business $25 per user per month billed monthly ($20 annual); Enterprise/Edu contact sales |
| Feature | Google Antigravity | OpenAI Codex |
|---|---|---|
| Desktop app | Yes (Antigravity 2.0) | Yes |
| Terminal CLI | Yes, with background subagents | Yes, open source |
| IDE extensions | Yes, plus a standalone IDE | Yes (VS Code, Cursor, Windsurf) |
| SDK for custom agents | Yes (Python) | Not stated |
| Web and cloud agent | Not stated | Yes (web and iOS on Plus) |
| Mobile apps | Not stated | Yes (iOS, Plus plan) |
| Scheduled tasks | Yes (scheduled messages) | Not stated |
| API | Yes, consumption-based | Yes, API key at API rates |
| Google Antigravity | OpenAI Codex | |
|---|---|---|
| Training on your data | Not stated | Not stated |
| Retention | Not stated | Not stated |
| Business controls | Not stated | Workspace admin features on Business; details not stated |
Taken from each vendor's published policy pages at the time of our check. Policies change; the source links are at the bottom.
Google's agentic development platform: desktop app, CLI, SDK and IDE extensions for working with coding agents.
Free stops at: Basic weekly rate limits
Verified antigravity.google (opens Google Antigravity website in a new tab)
Free · paid from $30/mo US · checked Sep 29
OpenAI's coding agent for the CLI, IDE extension, desktop app, web and iOS, included in ChatGPT plans or billed by API.
Free stops at: Desktop app only listed, Usage limits apply
Verified developers.openai.com (opens OpenAI Codex website in a new tab)
Free · paid from $8/mo US · checked Sep 29
Yes. The Individual plan is $0 per month with basic weekly rate limits. Google AI Pro and Ultra add more rate limits and a credit pool, but their prices are not shown.
A Free ChatGPT plan includes Codex, but the Free and Go plans list the desktop app only. Plus at $20/month adds Codex on the web and iOS.
Codex lists Business at $25 per user per month billed monthly, or $20 billed annually. Antigravity business access goes through Google Cloud and requires contacting sales, so we cannot compare it on price.
Yes, with an API key billed at API rates. Cloud features such as GitHub code review and Slack are not available with an API key.
Only official vendor pages. No third-party benchmarks, forum threads or press were used. How we review.
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